MWF_13 - Organic Lecture Series CH 310/318 M Textbook...

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Organic Lecture Series 1 CH 310/318 M LECTURE 13 Textbook Assignment: Chapter 4 Today’s Topics: Acid Base Chemistry Acid Base Chemistry -Introduction; Introduction; pKa pKa Notice & Announcements: HW 4 posted Organic Lecture Series 2 Acids and Acids and Bases Bases Chapter 4 Chapter 4
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Organic Lecture Series 3 Molecular Structure and Acidity Molecular Structure and Acidity • The overriding principle in determining the relative acidities of uncharged organic acids is the stability of the anion, A - , resulting from the loss of a proton. ¾ the more stable the anion, the greater the acidity of HA Organic Lecture Series 4 Ways to stabilize anions include having the negative charge: 1. on a more electronegative atom. 2. on a larger atom. 3. delocalized through resonance. 4. delocalized by the inductive effect. 5. in an orbital with more s character. Molecular Structure and Acidity Molecular Structure and Acidity
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Organic Lecture Series 5 1. Electronegativity of the atom bearing the negative charge Within a period, the greater the electronegativity of the atom bearing the negative charge, the more strongly its electrons are held, the more stable the anion is, and the stronger the acid.
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This note was uploaded on 03/18/2012 for the course CH 310 M taught by Professor Iverson during the Spring '09 term at University of Texas.

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MWF_13 - Organic Lecture Series CH 310/318 M Textbook...

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